With the discussion occurring occasionally about the headphone jack failing on the K2, thought I would pass along my thoughts. I have always had an aversion, (lazy) about plugging and unplugging headphones, from the front of a receiver/transceiver, so over the years I have simply used the speaker output from the receiver to drive the headphones, through a speaker/headphone switch mounted in a separate audio box. The schematic of the audio interface box I use now is available at http://www.thewinstonator.com/PDF%20FILES/digital%20interface.pdf Yes, I know I do not use the K2 speaker, but I have found I prefer a speaker that points at me rather then up, I use a old Heath Kit HS-1661 speaker, I repackaged into a new case. The HS-1661 speaker can give plenty of volume as I rarely turn the volume control above the 9 or 10 o'clock position. The HS-1661 speakers can be found at hamfests for about $10 to $20 and I prefer it over the the old Westinghouse mobile radio speakers. I have not tried the K2 with the Motorola mobile speakers, but the case looks the same as the Westinghouse, and I suspect the speaker is similar. On some of my old rigs with low impedance speaker output and high impedance headphones, I have simply wired in a audio transformer (usually a old small audio output speaker) to drive the headphones. Now a day this is not necessary as most headphones are low impedance. 72, Steve Ray K4JPN ex K1VKW EM82ep Warner Robins GA Elecraft K2 1422 & KPA-100 Heath Fan HW-101, HW-8 http://www.thewinstonator.com/K4JPN.htm
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